A study co-led by the Universities of Oxford, Birmingham and Southampton and the U.K. Health Security Agency (UKHSA), published in Lancet Oncology today by the U.K. Coronavirus Cancer Evaluation Project, has found that while COVID-19 vaccination is effective in most cancer patients, the level of protection against COVID-19 infection, hospitalization and death offered by the vaccine is less than in the general population and vaccine effectiveness wanes more quickly.